Experimental Stress Analysis. Instructor: Prof. K. Ramesh, Department of Applied Mechanics, IIT Madras. The course covers the basic aspects of experimental stress analysis that includes exhaustive treatment of the most versatile techniques like photoelasticity and strain gauges and also a brief introduction to the emerging techniques like digital image correlation. In addition it also provides the fundamental aspects of six different experimental techniques such as Moire, brittle coatings, holography, speckle methods, thermoelastic stress analysis and caustics.
(from nptel.ac.in)
Lecture 14 - Retardation Plates, Stress-Optic Law
Concepts covered in this lecture: Sheet polarisers (cont)., Retardation plates and wave plates, Quarter wave, Half wave and Full wave plates, Stress-optic law, Maximum stress information obtainable by photoelasticity.